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. 2007 Oct 24;8(4):76–95. doi: 10.1120/jacmp.v8i4.2693

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© 2007 The Authors.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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The calculated dose $[(D_{34 cm} - D_{5 cm} / D_{34 cm}]$ , with and without multileaf collimator (MLC) scatter, compared with the absolute dose $D_{34 cm}$ per field determined by measurement. The $D_{34 cm}$ signifies dose per field for an intensity‐modulated radiation therapy plan with $c_{y} = 34 cm$ ; the $D_{5 cm}$ signifies dose per field for the same plan with y jaw cropped to 5 cm.